A person's core temperature is considered the most accurate since it is:

A) reflective of the surrounding environment.
B) the same for everyone.
C) controlled by the hypothalamus.
D) independent of external influences.

The core temperature,or the temperature of the deep body tissues,is under the control of the hypothalamus and remains within a narrow range.Skin or body surface temperature rises and falls as the temperature of the surrounding environment changes,and it fluctuates dramatically.Body tissues and cells function best within a relatively narrow temperature range,from 36° C to 38° C (96.8° F to 100.4° F),but no single temperature is normal for all people.For healthy young adults,the average oral temperature is 37° C (98.6° F).An acceptable temperature range for adults depends on age,gender,range of physical activity,hydration status,and state of health.